Scottsdale tr putters are named for the true roll they provide as the result of pingrsquos innovative new variable depth groove technology grooves are deepest in the center and get gradually shallower toward the perimeter to equalize ball speeds for exceptional distance control on putts struck on the center heel or toe adjustable length shafts help optimize performance and 12 models fit every stroke typevariable depth grooves in the insert are deepest in the center and get gradually sha